18958820

素因数分解:

$2^2\times 5^1\times {\mathrm{479}}^1\times {\mathrm{1979}}^1$

素因数の和:2467

約数の個数: 24

約数和(自身を含む): 39916800

約数和(自身を除く): 20957980

約数列:

[1, 2, 4, 5, 10, 20, 479, 958, 1916, 1979, 2395, 3958, 4790, 7916, 9580, 9895, 19790, 39580, 947941, 1895882, 3791764, 4739705, 9479410, 18958820]

約数ペア:

[(1, 18958820), (2, 9479410), (4, 4739705), (5, 3791764), (10, 1895882), (20, 947941), (479, 39580), (958, 19790), (1916, 9895), (1979, 9580), (2395, 7916), (3958, 4790)]